Sections R102.6.1.1 and R102.6.1.2 are added to read as follows:
R102.6.1.1 Substantial Improvement. Where the proposed work includes any demolition, alteration, repair, or relocation of more than 50 percent of the existing building or component of the building, the remaining portion of the building or building component shall be upgraded to comply with the structural provisions, as well as fire and life safety provisions of this code in such cases where the Building Official determines that the existing portions of the building are substantially deficient or pose a significant hazard.
When determining the percentage of demolition, alteration, repair, or relocation, one of the following methods shall be applied, at the discretion of the Building Official:
a. | A comparison of the square footage, lineal footage, or number of components or fixtures of the proposed demolition, alteration, repair, or relocation to the total square footage, lineal footage, or number of components or fixtures, as may be applicable. |
b. | A comparison of the valuation of the proposed demolition, alteration, repair, or relocation to the valuation of the existing building. |
The provisions of this section shall be cumulative over any 12 month period.
R102.6.1.2 Substantial Addition. Where the proposed work includes addition of new floor area that is greater than 100 percent of the existing building floor area, the existing portion of the building shall be upgraded to comply with the structural provisions, as well as fire and life safety provisions of this code in such cases where the Building Official determines that the existing portions of the building are substantially deficient or pose a significant hazard.
When determining the floor area of the existing building, the area of the garage or other unconditioned spaces shall not be included in the total area.
The provisions of this section shall be cumulative over any 12 month period.
(Ord. 25-5, 11/25/2025)